Blue Sky Department

Ideas are easy. Making them work is the hard part.

Properties of a Finite Universe
Edges of the Universe
Speculations on Negative Mass

Magnetic Flywheel - A Sub-relativistic Flywheel Design.

Compression as Encryption

A Fractal Manifold with Application to Rocketry.

Rocket Design - Reusable Launch Vehicles
Beyond Chemical Rockets - Nuclear, laser and microwave powered rockets.
Tethered Interplanetary Vehicles - Nuclear powered manned space travel.
On the technology from the fiction of C.J. Cherryh